Installation essential .NET-FW-updates fails - error 0x643+0x80070

For more then a week the installation on an essential security
..NET-FrameWork-update for version 1.1 fails; error 0x643.

Looking over Microsoft website I tried two things:
- rename the Software-Distribution folder so that Windows created a new one;
- I removed all installed .NET-FW versions (1.1, 2.0, 3.0 and 3.5) by
Control Panel/Software and then the remnants by WindowsInstallCleanup
application.
Then I had to run Windows Update and it wanted to install .NET-FW 3.5 SP1
with .NET-FW 3.5 Family-Update x86.
Installation failed again; Error 0x80070645.

So, what to do now? Could there be a missing file?
I cleaned up my pc and ran ccleaner two weeks ago.


Error 0x643

Error 0x80070645

 

See MVP MowGreen's reply to an earlier post involving the error:

<http://www.microsoft.com/communities ewsgroups/en-us/default.aspx?&lang=en&cr=US&guid=&sloc=en-us&dg=microsoft.public.windowsupdate&p=1&tid=6744228b-ac01-42b7-ad9d-dc54b7aaa3a4&mid=6744228b-ac01-42b7-ad9d-dc54b7aaa3a4>



Ǝиçεl
-=-

"Janek" wrote:
<!--coloro:blue--><span style="color:blue <!--/coloro-->
> For more then a week the installation on an essential security
> .NET-FrameWork-update for version 1.1 fails; error 0x643.
>
> Looking over Microsoft website I tried two things:
> - rename the Software-Distribution folder so that Windows created a new one;
> - I removed all installed .NET-FW versions (1.1, 2.0, 3.0 and 3.5) by
> Control Panel/Software and then the remnants by WindowsInstallCleanup
> application.
> Then I had to run Windows Update and it wanted to install .NET-FW 3.5 SP1
> with .NET-FW 3.5 Family-Update x86.
> Installation failed again; Error 0x80070645.
>
> So, what to do now? Could there be a missing file?
> I cleaned up my pc and ran ccleaner two weeks ago.
>
>
> Error 0x643
>
> Error 0x80070645 <!--colorc--><!--/colorc-->

 

1. Before doing anything else, write down the .NET Framework versions which
are already installed:

How to determine which versions of the .NET Framework are installed and
whether service packs have been applied


2. Now see Resolution Method 2 in...

When you try to install an update for the .NET Framework 1.0, 1.1, 2.0, 3.0,
or 3.5, you may receive Windows Update error code "0x643" or Windows
Installer error code "1603" (ignore the title, if need be)


After running the appropriate eeded tool, (re)install all .NET Framework
versions manually using the download links on the page then run Windows
Update manually to install security updates for same.

NB: If you've removed .NET Framework 3.5 SP1, reinstalling it will also
install .Net Framework 2.0 SP2 and 3.0 SP2.

IMPORTANT! => If you've removed .NET Framework 3.5 SP1, reinstall your .NET
Framework versions in the following order:

1. .Net Framework 3.5 SP1, then...
2. .Net Framework 1.1, then...
3. .Net Framework 1.1 SP1

NB: KB923100 references this page:
. Please read
ALL of it as well as the related page
before using the .NET
Framework Cleanup Tool.
--
~Robear Dyer (PA Bear)
MS MVP-IE, Mail, Security, Windows Client - since 2002



Janek wrote:<!--coloro:blue--><span style="color:blue <!--/coloro-->
> For more then a week the installation on an essential security
> .NET-FrameWork-update for version 1.1 fails; error 0x643.
>
> Looking over Microsoft website I tried two things:
> - rename the Software-Distribution folder so that Windows created a new
> one;
> - I removed all installed .NET-FW versions (1.1, 2.0, 3.0 and 3.5) by
> Control Panel/Software and then the remnants by WindowsInstallCleanup
> application.
> Then I had to run Windows Update and it wanted to install .NET-FW 3.5 SP1
> with .NET-FW 3.5 Family-Update x86.
> Installation failed again; Error 0x80070645.
>
> So, what to do now? Could there be a missing file?
> I cleaned up my pc and ran ccleaner two weeks ago.
>
>
> Error 0x643
>
> Error 0x80070645 <!--colorc--><!--/colorc-->